hapi Hawk authentication plugin

Hawk authentication provides a holder-of-key authentication scheme. The scheme supports payload authentication. The scheme requires the following options:

• getCredentialsFunc - credential lookup function with the signature function(id, callback) where:
  • id - the Hawk credentials identifier.
  • callback - the callback function with signature function(err, credentials) where:
    • err - an internal error.
    • credentials - a credentials object passed back to the application in request.auth.credentials. Return null or undefined to indicate unknown credentials (which is not considered an error state).
• hawk - optional protocol options passed to Hawk.server.authenticate().

var Hapi = require('hapi');
var server = new Hapi.Server();

var credentials = {
    d74s3nz2873n: {
        key: 'werxhqb98rpaxn39848xrunpaw3489ruxnpa98w4rxn',
        algorithm: 'sha256'
    }
}

var getCredentials = function (id, callback) {

    return callback(null, credentials[id]);
};

server.pack.require('hapi-auth-hawk', function (err) {

    server.auth.strategy('default', 'hawk', { getCredentialsFunc: getCredentials });
});

Bewit authentication provides a short-term access to a protected resource by including a token (bewit) in the request query, issued by an authorized party. Bewit is a subset of the Hawk protocol. The scheme can only be used with 'GET' requests and requires the following options:

• getCredentialsFunc - credential lookup function with the signature function(id, callback) where:
  • id - the Hawk credentials identifier.
  • callback - the callback function with signature function(err, credentials) where:
    • err - an internal error.
    • credentials - a credentials object passed back to the application in request.auth.credentials. Return null or undefined to indicate unknown credentials (which is not considered an error state).
• hawk - optional protocol options passed to Hawk.server.authenticateBewit().

var Hapi = require('hapi');
var server = new Hapi.Server();

var credentials = {
    d74s3nz2873n: {
        key: 'werxhqb98rpaxn39848xrunpaw3489ruxnpa98w4rxn',
        algorithm: 'sha256'
    }
}

var getCredentials = function (id, callback) {

    return callback(null, credentials[id]);
};

server.pack.require('hapi-auth-hawk', function (err) {

    server.auth.strategy('default', 'bewit', { getCredentialsFunc: getCredentials });
});

To send an authenticated Bewit request, the URI must contain the 'bewit' query parameter which can be generated using the Hawk module:

var Hawk = require('hawk');

var credentials = {
    id: 'd74s3nz2873n',
    key: 'werxhqb98rpaxn39848xrunpaw3489ruxnpa98w4rxn',
    algorithm: 'sha256'
};

var uri = 'http://example.com:8080/endpoint';
var bewit = Hawk.client.getBewit(uri, { credentials: credentials, ttlSec: 60 });
uri += '?bewit=' + bewit;